Continuous transverse permeability of fibrous media

Ouagne, Pierre; Bréard, Joël

doi:10.1016/j.compositesa.2009.07.008

Cited by 66 publications

(56 citation statements)

References 20 publications

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“…During the forming step of very complex shapes significant deformations may occur resulting in local variation of the textile reinforcement geometry. These modifications of the reinforcement (homogeneity, fiber volume fraction, deformation state, ..) strongly influence the resin flow impregnation by the modification of the permeability components (longitudinal and transverse) [5][6][7]. They also influence the mechanical properties of the final composite part [3,8,9].…”

Section: Introduction and Context Of The Studymentioning

confidence: 99%

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

et al. 2012

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:This experimental work concerns the study of the preforming of a specific highly double curved geometry with a triple point (case corner) by the sheet forming process using powdered interlock reinforcement (G1151 ® ). Three different punches (square box, prism, tetrahedron) were used in this study, each of them presenting highly double curved geometry with a case corner. A specific sheet forming device specially designed for the preforming of textile reinforcement was used. The expected shapes with the three punches have been obtained with an optimized blank-holder pressure. No classical defaults such as wrinkling or yarn damage are present in the useful zone of the preforms. However, a new default, not observed for spherical or hemispherical shape has been identified. It concerns the out of plane buckling of yarns. This phenomenon not observed on the square box is visible on some faces and edges of the prismatic and tetrahedron shapes. For the square box, it is easily possible to control the orientation of the yarn within the preform in the faces, whereas this is not possible for triangular faces 2 of the prismatic and tetrahedron shapes. The square box punch is therefore more adapted to preform the highly doubled curved shape with the case corner.

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Section: Introduction and Context Of The Studymentioning

confidence: 99%

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

et al. 2012

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“…Permeability measurements have been treated by numerous authors in the planar directions [12][13][14][15][16]. In addition, several studies deal with the subject of transverse permeability [18][19][20][21], that needs to be characterized especially in the case of processes like as VARTM process or the resin film infusion (RFI) [22]. In fact, conversely to RTM, these processes exhibit significant through-the-thickness impregnation gradients [23,24] that may affect the total fiber impregnation, the filling time and, consequently, the dimensions and mechanical properties of the final composite part.…”

Section: Introductionmentioning

confidence: 99%

Permeability characterization of stitched carbon fiber preforms by fiber optic sensors

Antonucci¹,

Esposito²,

Ricciardi³

et al. 2011

Express Polym. Lett.

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Abstract. The in-plane and through thickness permeability of unidirectional stitched carbon fiber preforms have been determined through vacuum infusion tests. The impregnation of various dry preforms with different stitching characteristics has been monitored by fiber optic sensors that have been stitched together with the dry tow to manufacture the dry preform. The experimental infusion times have been fitted by a numerical procedure based on Finite Element (FE) processing simulations. A good agreement between the numerical and experimental infusion times has been found demonstrating the potentiality of the fiber sensor system as suitable tool to evaluate impregnation times and permeability characteristics.

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“…low resistance pathways between layers [6]. In [7] and [8], the transverse permeability of fibrous preforms at various fiber contents was evaluated and low flow-rate was found crucial for continuous and discrete permeability measurements to avoid non-uniform flow.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Temperature Effect on the Transverse Permeability of a Fibrous Preform

Trindade¹,

Rodrigues²,

Kerche³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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Study of the transverse permeability of fibrous reinforcements became increasingly important when liquid molding processes started being more widely employed to obtain more complex-shaped or thicker parts. In this paper, a system specially built to measure transverse permeability of fabrics based on the correlation between pressure difference and flow rate was used to evaluate the effect of temperature on the measurements of the transverse permeability of a E-glass fiber fabric. Three fiber volume fractions (38-61%) and three temperatures were studied (20-63 o C). The results have shown that the effect of the temperature on the transverse permeability was limited.

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Continuous transverse permeability of fibrous media

Cited by 66 publications

References 20 publications

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

Experimental preforming of highly double curved shapes with a case corner using an interlock reinforcement

Permeability characterization of stitched carbon fiber preforms by fiber optic sensors

Experimental Evaluation of Temperature Effect on the Transverse Permeability of a Fibrous Preform

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